Method of inhibiting the growth of sulfate reducing bacteria in water flooding processes



Patented Aug. 14, 1962 3,049,492 METHOD OF INHIBITING TI-m GRGWTH F SUL- FATE REDUCING BACTERIA IN WATER FLOGD- ING PROCESSES Melvin De Groote, St. Louis, and Jen Pu Cheng, Uni- This application is a continuation-in-part of our copending application Serial No. 532,121, filed September 1, 1955;and Serial Nos. 548,748 and 548,749, filed November 23, 1955.

This invention relates to a process of bacteria control, particularly from the standpoint of water flooding operations employed in the secondary recovery of petroleum oil. More specifically, it is concerned with the prevention of sulfate-reducing bacteria which are active in the plugging of sands and piping of the injection water of such secondary recovery systems.

The invention will be described particularly from what appears to be by far its most important use, to wit, to control sulfate reducing bacteria in connection with the recovery of oil from subterranean oil-bearing strata, and particularly those found in the piping systems. The use of an additive in flooding processes for recovery of oil from subterranean oil-bearing strata is described in U.S. Patent 2,233,381, dated February 25, 1941, to De Groote and Keiser.

Over a period of time it has been recognized that various additives may be added to flood water in such oil recovery procedures in order to obtain certain benefits or advantages. For instance, it has been proposed to add an acid in order to alter the pH of the water. See Producers Monthly, vol. 9 (1945), #12, pp. 19-23. Along with the addition of acid, of course, it has been proposed to use a corrosion inhibiting agent. It has also been proposed to use a material such as a sequestering agent which prevents precipitation of calcium and magnesium salts. I It has been proposed to add materials which would lower the surface tension of the water. It has been proposed to add agents which would increase the wettability of the flood water for the sand and thus loosen the oil. It has been proposed to employmaterials which have bactericidal or fungicidal action. It has been proposed to add materials which prevent the formation of emulsions in the subterranean strata. It has been proposed to use chlorine, formaldehyde or similar products.

The addition of agents to flood water has been proposed for other purposes such as deflocculants so as to be certain that any insoluble material is suspended in the flood system and does not clog the system at any point.

At times it has been proposed to add an agent or additive or chemical compound which, although perhaps a compromise, was beneficial in more than a single respect, i.e., was polyfunctionally active and advantageous.

The present invention is concerned in its more important aspect with the process of bacterial control in sand flooding procedure and more specifically in the control of sulfate-reducing bacteria.

As to the prevention of microbiological growths in water flood operation see Producers Monthly, volume 11 (1947), #12, pages 21 to 26. This article states "Bacterial Plugging 0f Sands Numerous observations may be cited which indicate that bacteria are very effective, in causing a plugging of sand faces in water input Wells.

In the East Texas field where brines are being injected back into the sands in order to prevent stream pollution and to help maintain the reservoir pressure it has been found necessary to treat the injected water to prevent growth of bacteria, particularly sulfate-reducing bacteria which are active in plugging the sands in the injection wells. Large periodic doses of chlorine, or formaldehyde have been found to be beneficial in most cases but not entirely satisfactory in correcting the trouble.

Also see Producers Monthly, volume 18, No. 4, pages 18 to 22, The Role of Microorganisms, R. C. Allred, for a discussion of bacterial control in oil field water flooding operations.

This invention is thus concerned with a process of inhibiting bacteria growth in the recovery of oil from oilbearing strata by means of flood water taking place' in the presence of anaerobic sulfate-reducing bacteria and in the presence of soluble ferrous salts. The process is characterized by being conducted in the presence of a solvent solution of a bactericide being the reaction product obtained by reacting at a temperature of about to 300 C. for from about 1 to 4 hours (A) an oxirane ring containing compound selected from the class consisting of epoxidized higher fatty acids, epoxidized higher fatty acid esters, epoxidized higher fatty acid amides, epoxidized higher fatty alcohols and epoxidized higher fatty acid glycerides, with (B) an oxyalkylation-susceptible nitro gen containing compound selected from the class consisting of hydrazine and monoamino and polyamino com.- pounds composed of carbon, hydrogen, oxygen and nitrogen atoms, having only functional groups selected from the class consisting of hydroxyl groups, primary amino groups and secondary amino groups and having at least one such functional amino group; said reaction between (A) and (B) involving rupture of the oxirane ring and resulting in the formation of one of the following groupings For purpose of convenience, what is said hereinafter will be divided into four parts;

Part 1 is concerned with the derivatives obtained by the epoxidation of fatty acids or the like, and generally characterized by the presence of at least one oxirane ring per fatty acid molecule;

Part 2 is subdivided into eleven sections, and is concerned with amino compounds which are non-resinoid in nature and may or may not include in their structure a hydrophobe group, i.e., a group having 8 or more uninterrupted carbon atoms in a single radical, or the like. Such amino reactants must contain a reactive hydrogen atom generally attached to either nitrogen or oxygen. The presence of such reactive hydrogen atom is necessary for reaction with the oxirane ring. Stated another way, such reactants must be oXyalkylation-susceptible..

Part 3 is concerned with reactions involving the two classes of reactants above, i.e., those described in Part 1 and those described in Part 2;

Part 4 is concerned with bacteria control employing the reaction products of Part 3.

PART 1 acids themselves, is well known. For instance, it has been described in the following patents:

US. Patents Nos. 2,443,280, 2,445,892, 2,457,328, 2,458,484, 2,485,160, 2,487,829, 2,510,905, 2,556,145,

ans-9,492

Additionally epoxidation procedures have been described in the trade literature of organizations which supply one or more reactants employed in the procedure. For instance, see Bulletin P63-355 entitled Hydrogen Peroxide-Resin Technique for the Preparation of Peracetic Acid, E. I. du Pont de Nemours & Company; Bulletin 1 61-454 entitled Hydrogen Peroxide-Resin Technique for Epoxidation of Unsaturated Fats, Oils, and Derivatives, E. I. du Pont de Nemours & Company; and booklet entitled Hydrogen Peroxide, issued by Buffalo Electro- Chemical Company, Inc. See also Chemical Week, August 1, 1945, page 100; and Chemical Week, December 25, 1954, page 32.

An excellent brief description is found in US. Patent No. 2,692,271, dated October 19, 1954, to Greenspan et al.

In broad aspect, epoxidation comprises a reaction at a point of unsaturation of the ethylene type in a hydrocarbon compound whereby the unsaturated linkage is by the addition of oxygen changed to an oxirane compound.

Many methods of epoxidation have been suggested. For instance, the ethylene linkage has been reacted upon by the employment of perbenzoic acid in a non-aqueous solvent such as chloroform and peracetic acid used in aqueous solution. Many other peracids have been found effective as epoxidizing agents, perphthalic and percamphoric, among others.

Fatty acids and fatty acid derivatives which may be subjected to epoxidation by conventional procedures are ilustrated by the following:

In the above formulas R and R represent monovalent and divalent hydrocarbon radicals having at least 3 carbon atoms. R is a divalent radical.

Stated another way, it is preferable that the ethylene linkage which is subjected to epoxidation is at least 2 carbon atoms removed from the terminal carbon atom is at least 2 carbon atoms removed from the terminal carbon atom or the carboxyl carbon atom, or what was initally the carboxyl carbon atom. For example, in the second formula, i.e., the formula of the alcohol, it will be noted of course that the carboxyl group has been converted into the terminal alcoholic radical.

In the last two formulas R" represents the ester radical which may be monohydric, dihydric, trihydric, tetrahydric, etc.

In the last formula n is a small whole number varying from 2 to 6 for example, which corresponds to the valency of the multivalent radical R".

One can purchase a large number of suitable epoxidation products in the open market or can prepare the same if desired. In a general way, of course, the most economical products are those derived from naturally-occurring glycerides as, for example, soyabean oil.

The vegetable oils which when epoxidized can be used in practicing the present invention are those glycerides of saturated and unsaturated acids which have a degree of unsaturation represented by an iodine value of from 90 to 205 and in which the fatty acids neither are hydroxylated nor possess conjugated unsaturation. The semi-drying vegetable oils, which are primarily glycerides of oleic and linoleic acids, are preferred. Among those oils which can be used are epoxidized peanut, rapeseed, cottonseed,

corn, tobacco seed, cucurbit, sunflower, safilower, poppyseed, linseed, perilla, and soybean oils. Of these epoxidized oils, soybean oil is particularly efficient.

If the fatty acid group has some other functional group present, difliculty may be involved in obtaining optimum yields for some reason that is not entirely clear. This would apply, for example, to castor oil, and ricinoleic acid esters. On the other hand, if castor oil is reacted with a low molal acid such as acetic acid, propionic acid, or the like, then these difiiculties appear to be eliminated. There also appears to be difficulty in obtaining suitable yields in the case of conjugated unsaturation. In some instances where the unsaturation is not conjugated there is indication that there may be a shift during reaction to produce conjugation. In other Words, in the epoxidation of the fatty acid or fatty acid ester or the like, if the fatty acid is polyethylenic it is very important that the ethylenic radicals be non-conjugated. The fatty acids themselves may contain 8 to 22 carbon atoms. The best example of the monoethylenic acid is, of course, oleic acid and perhaps erucic acid. Both are readily available as glycerides, As to the polyethylenic acids, particular attention is directed to linoleic. As to an example of an acid having 3 ethylenic linkages attention is directed to linolenic. These acids, of course, are available in the form of glycerides, particularly mixed glycerides. Other polyethenoic acids are obtained from oils of aquatic origin.

The alcohols derived from the fatty acids are susceptible to epoxidation but present added difliculties by resulting in somewhat lower yields, perhaps due to the presence of the hydroxyl group. However, alcohols which are suitable for epoxidation include, among others, oleyl alcohol, linoleyl alcohol, linolenyl alcohol, mixed arachidonylclupanodonyl alcohols, erucyl alcohol, and ricinoleyl alcohol.

The various unsaturated acids previously described, monoethylenic or polyethylenic, can be converted into the corresponding esters by conventional methods. In fact, esters of soya bean fatty acids are available commercially as well as esters of various other unsaturated acids, for instance, ricinoleic acid. The esters generally available are methyl, ethyl, propyl, and butyl. Other esters can be employed, however, wherein the monohydric alcohol can be amyl alcohol, hexyl alcohol, allyl, etc. The alcohols can be cyclic as in the case of benzyl alcohol, cyclohexanol, furfuryl, etc. The alcohols are generally characterized by having less than 8 uninterrupted carbon atoms and generally less than 8 carbon atoms in the alcohol without any limitation whatsoever. Needless to say, when the monohydric alcohol esters are derived from mixed fatty acid glycerides, the esters themselves represent a cogeneric mixture.

Epoxidized fatty acid amides can be prepared according to the method described in US. Patent 2,567,237 to Scanlan et a1.

PART 2 Section 1 n-Butyl amine Dodecylamine Dibutyl amine Monoethanolamine 2-ethylhexyl amine Diethanolamine Di(2-ethylhexyl) amine Monoisopropanolamine Diisopropanolamine Methyl isopropanolamine Butyl isopropanolamine N-methyl ethanolamine N-ethyl ethanolamine n-Amylamine Di-n-amylamine Sec-amylarnine Hexylamine N-ethylbutylamine Dihexylamine 2-amino-4-methylpentane Heptylamine 4-amino-2-butanol Octylamine S-isopropylamino-l penta- Dioctylarnine nol Decylamine N-butylaniline Furfurylamine 2-amino-2-methyl-1-propa- 2,2-diethyl-2-amino ethanol nol 2,2-dimethyl-2 amino eth- 2-amino-2-methyl-1,3 proanol panediol 3-amino-1,2-butanediol 2-amino-2-ethyl 1,3 pro- 4-arnino-1,2-butanediol panediol 2-amino-1,3-butanediol 3-amino-2-methyl-l-propa- 4-amino-1,3-butanediol nol 2-amino-1,4-butanediol 3-amino-1,4-butanediol 1-amino-2,3-butanedio1 Z-amino-l-butanol S-amino 2,2 dimethyl-lpropanol Tris-(hydroxy methyl) ami- 2-amino 2,3 dimethyl-lno methane propanol Amines having ring structures of course include aniline, diphenylamine, cyclohexylamine, dicyclohexylamine, and various comparable amines with alkyl substituents in the ring.

Other suitable amines are those obtained from sugars or comparable derivatives, such as glucamine and maltosamine. A product such as glucose can be reacted with a primary amine such as hexylamine, acetylamine, decylamine, dodecylamine, or the like, and then subjected to reduction so as to give other suitable primary amines.

A monoamine compound can be cyclic or non-cyclic. Those which are cyclic may be heterocyclic as in the case of morpholine and its derivatives or oxazolines which may be regarded as derivatives of N-acyl-2-amino-ethano1s. This would apply where instead of being a derivative of monoethanolamine the oxazoline was a derivative of a low molal acid or a high molal acid and Z-amine-Z-methyl-1,3-propanediol.

Section 2 The polyamines which may be employed as reactants fall within two types. The first type is characterized by the fact that the polyamines have at least one primary amino radical separated from another primary or secondary amino radical by two to three carbon atoms in a single chain. These polyamines under certain conditions can form cyclic amidines and thus are important from what is said in Part Six, subsequently.

One may use polyamines corresponding to the formula X= to 8 in which R" is hydrogen, alkyl, cycloalkyl, aryl, or aralkyl and R is a divalent radical such as CH CH Stated another way, the polyamines have at least one pnmary amino group separated from another primary or secondary amino group by 2 to 4 carbon atoms. Examples of suitable amines include:

Ethylenediarnine Tripropylenetetrarnine Diethylenetriamine Butylenediamine Triethylenetetramine Aminoethylpropylenedi- Tetraethylenepentamine amine P-ropylenediamine Aminoethylbutylenedi- Dipropylenetriamine amine Other polyamines in which the nitrogen atoms are separated by a carbon atom chain having 4 or more carbon atoms include the following: Tetramethylenediamine, pentamethylenediamine, and especially hexamethylenediamine. The latter is of particular interest because the product is commercially available in light of its use in the manufacture of synthetic fibre.

If desired, one can prepare a variety of reactants having two or more amino groups and at least one hydroxyl group. One may use modifications of procedures or the procedures themselves as described in US. Patents Nos. 2,046,720, dated July 7, 1936, to Bottoms; 2,048,990, dated July 28, 1936, to Britton et 211.; 2,447,821, dated August 24, 1949, to Sankus; and 1,985,885, dated January 1, 1935, to Bottoms. Examples include the following:

CH CH N-CHzCH2N C 3 CHzCHOHCHzNHz CzHs CHgCHg N -CH2CHr-N CHaCHz CHzCHOHCHzNH:

CH3 CH3 N'CH2CHzN .NHzCHzCHOHCH:

GHzCHOHCHOHCHHNQH tures include piperazine, and the corresponding derivatives obtained by treating piperazine with alkylene oxides. The

same applies to substituted piperazine such as the 2,5-dimethylpiperazine.

As to mono-substituted dialkanol piperazine see US. Patent No. 2,421,707, dated June 3, 1947, to Malkemus.

Section 3 Another example of polyamine which may be employed as a reactant is the kind described as Duomeens.

TABLE 1 Duomeen is a trademark designation for certain diamines made by Armour Chemical Division, Armour & Company, Chicago, Illinois. The Duomeens have the following general formula R is an alkyl group derived from a fatty acid 01' from the mixed fatty acids as obtained from certain 011s. The specific Duomeen and the source of the radical R are as follows g1) Duomeen 12 2) Duomeen C R: Coconut oil fatty acid (3) Similarly, a com arable diamine, presumably obtained from Rosin mine D and aCry10111tll1e, 1S obtainable from Hercules Powder Company, Wilmington,

Delaware. The composition of Rosin Amine D is as follows:

CH3 CHzNHz /CH CH H3 CH;

Polyamines from monoamlnes and cyclic imlnes, such as ethylene imine.

H 1o i1-' Ca s-N N-decyl butylenediamine Polyamines containing tertiary amino groups It is to be noted that all the above examples show high molal groups, i.e., 8 carbon atoms or more. The same derivatives in which methyl, ethyl, propyl, butyl, amyl, hexyl groups, or the like, appear instead of octyl, decyl, etc., are equally satisfactory.

Section 4 Polyarnines of the kind described above, i.e., those having at least one primary amino radical separated from another primary or secondary amino radical by two to three carbon atoms in a single chain, can be converted into a number of products which in turn still have the characteristic requirements previously noted, i.e., are still oxyalkylation susceptible. A good example is a cyclic amidine obtained from a polyamine. trated by the following table:

TABLE 2 This may be illus- (Ex. N0. 1) N-CHg (Ju a-C lTT-C Hg H 2-nn-decylimidazoline N--GH2 17 ar- (Ex. No. 2)

2-heptadecylimidazoline NC H2 Cw aaC N -CH: 1'1

2-oleylimidazoline N- C H 0 H3 0 i7 a5 0 N- C H- 0 H 1'1 2-heptadecyl-4,5-dimethylimidaz oline NCH2 (Ex. No. 3)

(Ex. No. 4)

(Ex. No. 5)

N-O H;

C 2H4-NHC 7H4NH2 l-diethylenediamine-Z-unde cyleneylimidazoline (Ex. No. 6) N-CHg H OC17H3I C N-CH:

zH4NH- C 3H4NE- O 2H4NH3 Triethylenetriarnine-2-hydroxy-h eptadecylcneylimidazoline (Ex. No. 7) N-OHCH3 Gu h-C N-CH: Ha-NH-C aHu-NHQ 1-aminopropylaminopropyl, 2-abietyl, 4-methylimidazoline Tetrahydropyrimidinees from rnonoearboxy acids and trimethylenepolyamines (Ex. No. 8) N-CH:

C17H35-C CH2 C2H4-NH2 1aminoethyl, 2-heptadecyltetrahydropyrimidine (Ex. No. 9) N-CH-CH Co n-*0 2 N-CH:

l-aminoethylaminoethyl, 2-dodecyl, 4methyl tetrahydropyrimidine Cyclic amidines are derived conveniently from carboxy acids, including polycarboxy acids. As is well known, some polycarboxy acids have 3 or more carboxyl radicals; thus, it is possible to obtain cyclic amidines in which 3 or more ring radicals appear. The present invention, however, is limited to cyclic amidines having not over 2 ring radicals and preferably only one ring radical.

9 Cyclic amidines having more than one ring radical are illustrated by the following formulas:

(Ex. N0. N-CH: CH2N R-C\ /CR 5 N-OH; GHQ-N Rzhydroearb'on radical containing 8-32 carbon atoms l0 Cyclic amides containing basic ternary ammo groups:

(Ex. No. 11) NCH ia ar- NCH2 CH: 15

C2H4NHC 2Hi-NH-C 2H4I I 0 H3 It is to be noted that all the above examples show high molal groups, i.e., 8 carbon atoms or more. The same derivatives inwhich methyl, ethyl, propyl, butyl, amyl, hexyl groups, or the like, appear instead of groups having 11, 12, 17 or 19 carbon atoms, are equally satisfactory.

Section 5 Actually, cyclic amidines of the kind described previously are obtained in many instances from amides as intermediates in amidine manufacture. Suitable amides derived from amines of the kind described previously Diamides may be obtained from polyamines and 2 moles of acid.

Diethylenetriamine dicaprylamide (Ex. N0. 9)

Polyamides are derived from polycarboxy acids as well as monocarboxy acids. Thus it is possible to get poly- 0 amides by using acids containing more than one carboxyl group, as illustrated in the following examples:

(Ex. No. 10) O 0 v H II H H H N-O H NCRCN-C H -NH R(COOH) :Emery Dimeric Acid available commercially and said to be dilinoleic acid (Ex. N0. 11) O H 11 ll H Amino amides can be obtained from polyamides in which there is a terminal tertiary amine radical having a basic nitrogen atom. Another procedure involves the production of an amino amide from a polyamine in which the terminal radicals are either primary or secondary followed by alkylation of the amide so as to convert the residual terminal radical into a basic tertiary amine radical. Another procedure is to use a secondary amine, such as dibutylamine or dihexylamine, and react stepwise with ethylene imine or propylene imine. The polyamine so obtained contains a basic tertiary amino radical. The acylation of such a polyamine results in an amino amide which will form complexes comparable to those obtained from a basic tertiary amine. Examples of such amino amides are as follows:

(EX. No. 12) CH (Ex. N0. 13) CH It is to be noted that all the above examples show high molal groups, i.e., 7 carbon atoms or more. The same derivatives in which methyl, ethyl, propyl, amyl, butyl, hexyl groups, or the like, appear instead of groups having 9, 17, 19 carbon atoms or the like, are equally satisfactory.

Section 6 Actually a cyclic amidine having a hydroxy alkyl group may be esterified, provided that there is still a reactive hydrogen atom for combination with the epoxidized compound. This is illustrated by the following:

The type in which there is an imidazoline ring and only one high molal amino group is illustrated in the following:

N-OHZ 0235-0 If one employs a dicarboxy acid having 8 or more carbon atoms indicated by R(COOH) then compounds of the following type can be prepared: I

1 1 It is obvious that a high molal amine such as N dodecyl diethylene triamine having the formula H H C 2H25-N-CHgCHz-NCHzCHz-NH:

can be converted into an amide by reaction with a low 5 molal acid, such as acetic acid or a high molal acid, such as oleic acid. Such compounds can be illustrated by the following:

ethylene oxide so as to have a terminal radical, thus:

C2H4OH H H C1zH25N--CH2CHz-NCHz-CHg-N 02H4OH it becomes obvious that an ester can be formed from either acetic acid or oleic acid as illustrated by the following:

021140 0 C-C 7H33 CzH4OOC-CHa Needless to say, a compound such as dodecyl diethylene triamine previously illustrated can be converted into an imidazoline by conventional procedure, such a procedure already has been described above. The imid- 40 azoline may be derived from either a low molal acid, i.e., acetic acid, or a high molal acid, such as oleic acid.

Similarly, an amine of the following type:

can be converted into an oxazoline by using either a low molal monocarboxy acid or a high molal monocarboxy acid: or if the C H radical above is replaced by a CH radical suitable compounds are obtained using a higher fatty acid, such as oleic acid.

Such compounds can be illustrated by the following:

The introduction of a pent-oxazoline group requires 5 the use of a reactant such as the following:

CH OH H The previous examples seem to be more than ample for purpose of illustration. It is to be noted that combinations in which at least three different types of radicals appear are readily obtainable by reacting an imidazoline obtained from a tetramine or pentamine with an 12 acid, such as acetic acid or oleic acid so as to yield an amido imidazoline and then react such product with a glycidyl ether of the type H H H ROC-C--CH in which R represents a low or high molal group. Similarly, an imidazoline may be subjected to oxyalkylation and then to esterification followed by the use of glycidyl ether of the kind above described.

Likewise, another type of reactant is represented by compounds of the following structure which have been described in the patent literature R alkyl See Journal of the American Chemical Society, volume 68 (1946), page 1291.

Compounds containing the oxazoline ring or pentoxazoline ring and derived from a dicarboxy acid can employ the carboxyl radical so as to combine to form an imidazoline ring as previously described, or obviously to combine with an amine to form an amide group, or with a polyamine to form not only an amide group but also a compound which again can be reacted with an aminoglycidyl ether as above described to introduce a high molal group. Furthermore, such car'boxyl group could be esterified with triethanolamine or the like, or with a comparable polyamine to produce an amino ester.

Attention is directed to the fact that a compound such as N-octadecyl N,N',N tris-Z-hydroxyethyl-1,3-trimethylene diamine having the following formula CH2CH2OH CHzCHzOH CmHgr-N-CHICHIOHZN CH2CH1OH can be esterified with acetic acid or oleic acid to introduce an amino ester radical. Similarly, the amino ester so derived can be reacted in turn with an alkylene imine such as ethylene imine or propylene imine and then reacted with another mole of acid so as to introduce a third type, to wit, an amide type radical.

Section 7 An interesting group of compounds which have been noted previously are the non-cyclic a-midines having the general formula R1 /NH N-(CHz)sC R; NH:

where R and R are either or both an alkyl group or hydrogen, and n, an integer from 7 to 13. See British Patent 518,575.

Specific examples described in said British patent include the following:

NH 2 5) TN I) 10' C Kappa-diethylamin0n-undecane amtdine NH 4 B)2-N-(C 2)1O' Kappa-dlbutylamino-n-undecane amidine NH 4 D)2- H2)u-C Lambda-dibutylamino-n-dodecane amidlne Lambda-diethylamino-n-dodecane amidine Kappa-amino-n-undecane amidine Other suitable polyamino compounds which form salts or salt complexes as herein described, may contain acyl radicals or an acyl radical residue from low molal monocarboxy acids as, for example, acetic acid, propionic acid, butyric acid, hydroxyacetic acid, lactic acid, etc. This applies not only to cyclic amidines but also other compounds such as high molal polyamines, esters of hydroxylated polyamines, etc. Purely by Way of example attention is directed to the following formulas which illustrate such compounds:

Needless to say, the same comparable compounds can be obtained from another type of cyclic amidine, to wit, a tetrahydropyrimidine.

Other examples suitable for the present purpose are obtained by reacting high molal diamines of the formula H H H H H where R varies from 8 to 18 and particularly from 12 to 18, with a single mole of low molal monocarboxy acid such as acetic acid, propionic acid, butyric acid, etc.

Section 8 In many instances monoamines can be reacted with ethylene imine, propylene imine, or a'dialkyl aminoepoxypropane such as I H2CN/ wherein R and R" are alkyl groups, to convert a monoamino compound into a polyamino compound. This can be illustrated by suitable polyamino compounds having an oxazoline ring (S-membered or 6-membered).

TABLE 5 General reaction:

CH CH RCOOH HOCHz- -'CHz 2H H H,c-c 0m H NH: OH \O/ 1'1 2 amino-2-rnethyl-1,3-propanediol kyl Stearic acid, CH (CH COOH:

HOCH2+-CH2 C a( 2)is( 3 2 Oleic acid, C H CH:CH(CH COOH:

HOCHz- -CH2 N\ /O C CaH1 CH:CH(CHg) /H (B) Laurie acid, CH (CH CO0H:

HOCHr- -CH; I

C CH3(CH2)9$H2 (G) Let R OH be the simplified structure for all the four hydroxyethyl oxazolines.

General reaction:

R2 $2 R1OH $57013 IMO-CHz-CHNH;

CBH17CHICH(OH2)6(EHQ General reaction:

(6) (G) +RCOOH where R=C H In U.S. Patent 2,819,284, of Kwan-Ting Shen, there is described an apparently new class of materials, to wit, disubstituted cyclic amidines of the class of tetrahydropyrimidines and amino-imidazolines of the structure in which R.,, is a divalent radical, R is derived from an alpha-beta unsaturated acid, and the other symbols have their prior significance.

These materials are obtained by reaction between polyamines such as the polyethylene amines previously described, i.e., triethylene tetramine, tetraethylene pentamine, etc., and certain alpha-beta unsaturated acids such 16 as acrylic acid, crotonic acid, methacrylic acid, agelic acid, and sorbic acid.

It will be noted one can also prepare such products from nondistillable polyethylene amines, for instance, the 5 residual mixture in polyethylene manufacture which consists largely of pentaethylene hexamine or hexaethylene heptamine. Using such high amino compounds having, for instance, 6 or 7 nitrogen atoms per molecule one can obtain reactants which have as many as 20 nitrogen atoms in the molecule. Similarly, one can react dicarboxy or tricarboxy acids with 2 or 3 moles of the same polyamines having 5, 6 or 7 nitrogen atoms and obtain amides, polyamides or combinations in which cyclic amidine groups also appear and which may likewise have as many as 10 to 20 nitrogen atoms per molecule. In a general way, compounds of the types just referred to having up to 20 nitrogen atoms per molecule represent a practical upper limit in many cases.

Section 10 Said aforementioned Shen patent 2,819,284 also describes another class of material which can be used as reactants in the present invention, to wit, a somewhat analogous class of disubstituted cyclic amidines has been illustrated in which one substituent does not necessarily have a nitrogen atom. This is an instance of the kind in which hydroxyethyl ethylene diamine, hydroxypropyl ethylene diamine, hydroxybutyl ethylene diamine, hydroxy ethyl 1,3-propylene diamine, hydroxypropyl 1,3- propylene diamine, hydroxybutyl 1,3-propylene diamine, or the like, are used to give a type of compound previously illustrated to Wit,

UH -CH,

I CHzCHzNHCHzCHzNHCHzCHgOH Furthermore, the precursory diamines of the kind referred to above can be reacted with other alkylene oxides such as glycide, methyl glycide, allyl glycidyl ether, glycidyl isopropyl ether, glycidyl phenyl ether, styrene oxide, etc., on a mole-for-mole basis. The resultant of such reaction can be used in the same manner as the substituted diamines above noted.

The type of compounds described in aforementioned Shen application, Serial No. 521,387, filed July 11, 1955, are particularly valuable as reactants for the reason that either the class of materials described in Section 8, preceding, or in the present section, can be prepared free from any high molal group or a group which has at least 8 uninterrupted carbon atoms. Therefore, particularly valuable products are obtained by combination with the epoxidized products herein described which in turn supply a high molal group.

Attention is again directed to the fact that the polynitrogenous reactants preferably contain at least one basic nitrogen and preferably two or more. Furthermore, it is preferable that there be present at least one, and preferably two, primary amino groups. If one reacts ethylene diamine, diethylene triamine, triethylene tetramine, tetraethylene pentamine, or the like with 2 moles R! of a low molal acid such as acetic acid, propionic acid, butyric acid, or with a higher fatty acid such as oleic acid or stearic acid, or a combination of the two, one can obtain a compound having 2 amido radicals in which there is no basic nitrogen atom. If one uses one mole of an acid there is a single basic nitrogen atom. Our preference, however, is to use compounds in which 1 7 there are at least 2 basic nitrogen atoms and preferably having at least 2 basic primary amino groups. For this reason the preference in many instances is to employ polyamines such as diethylene triamine, triethylene tetra- 18 amples to products which are available commercially or can be obtained from suppliers of epoxidized products. These products are the following:

(1) Epoxidized soybean oil mine, tetraethylene pentamine, etc. In a large number 2 Epoxy butyl stearate of the examples which have appeared in the sections 3 lsobutylepoxyacetoxy Stearate preceding, the compounds illustrated have high molal 4 Methylepoxy Soyate radicals, for instance, one having 8 to 18 carbon atoms. 5 Epoxidized triacetylated Castor i I It is again desirable to point out that this is no limitation (6) Epoxidized alcohol derived fr soybean f tty i to the broad aspect of the invention. In each instance 10 A 1 d t th ti l th such high molal radicals can be replaced by a methyl S Prevlous Y Pomte mac on mvo vmg e group ethyl group propyl group butyl group amyl reactant contanmg the oxirane ring and the selected comou hex 1 mu be t 1 u th pound having a lab le hydrogen atom-1s essentially a Ph enyleri ediami rie T535683; an exar np le f a poly variety of oxyalkylation. For this reason the reactions amine which contributes substantially no basicity to the are so conducted procedure 18 slmpier i 1S the Product of reaction case when ethylene oxide or propylene oxide 18 used for Section 11 thei rdelason than the relactanzs are non-volatile as amrflule Another type of compound which may be reacted with g g g g i i gg z 2 :3; g g i if gz 3 the epoxidized derivatives are the hydrazines and hydraployed basic in charater and thus to the, extent zine derivatives of the kind which have been described 20 quired act as their own catalyst A has been poin'ted in numerous patents Although hydrazine particularly out elsewhere catalysts can be added, particularly alkaig g can reacted Wlth egoxyfionipounds 9 line catalysts such as sodium methylate, caustic soda, V1 O g at cannon l en to avol caustic potash, etc. In a general way, the procedure g g iv f Fl i to employed in preparing the reactants is the same and the 5: y roxyet y ydrazme W 1s commercla y avall' only precaution taken as a rule is to avoid temperatures 1 d h b 1 d h above that required to rupture the extreme ring for-the .3 compoun s malty e emp oye are t ose reason that side reactions or secondary reactions may w m correspond tot e formu a take place. The procedure is illustrated by Examples 1a and 13a and then by Tables Six through Twelve, R-O\ which present the data covering the preparation of a CHOH CH wide variety of products from the reactants described The acyl radical RCO can be deriveii from a low molal Previously acid or a high molal acid such as stearic acid. Example 1a See also US. Patent No. 2,371,133 which describes hydrazine derivatives containing hydroxyalkyl radicals A 300 thme'necked flask was t 'Wlth a rFfluX which are obtained by condensing one mol f a hydrazide condenser, a thermometer, and an efficient sealed stirrerl. of an aliphatic carboxylic acid containing at least 2 car- In fiask was f 150 gTams of Aflmex 711 bon atoms, which hydrazide contains at least one hydro- (eppxldlzsd soytfean 011) and 43 grams of methylene gen atom bound to a hydrazine nitrogen atom, with at f The f f was first surfed for 10 mmutesfltg least one mol of an alkylating agent which is capable msur? thPmugh Imxmg; then f Qadually apphe 1 of introducing an aliphatic radical containing the groupifh g s i 32%? 62 5 a ing -OC and also hydroxyl groups. 6 mac on was owe 0 co in As to the manufacture z hydroxyethyl hydrazine hours. Then thetemperature was raised to 130 C. to see US. Patent No. 2,660,607 dated November 24, 1953, 4.5 P i S E g T gggg g zggg g to Gever et v1scous q so u e 111 an 1 ul ifi ble with water.

Note also that low polymers of hydrazme. or Slmllar ifii ex is the trademark of Archer Daniels, Midland g p 3 3;? p sg t r g dlhydregmes f 3 Company, to indicate their particular products.

ormu a 2 2 2 may e emp oye as a reactant with the epoxidized derivatives. For fur- Example ther description of such polymethylene dihydrazines see In the same equipment as used in Example 1a, 175 Patent 2,445,518, dated July 1948, to grams of the epoxybutyl stearate were used along with 49 Dreyfusgrams of diethylene triamine. No added catalyst was PART 3 employed. The reaction took place readily at 110 0.,

Part 3 is concerned with reactions between the two the time required was 3 hours. The final product was classes of reactants described in the foregoing, i.e., those a brown liquid, soluble in both xylene and isopropanol described in Parts 1 and 2. and having definite surface active properties.

For purpose of brevity we are going to limit the ex- Additional examples appear in the following tables.

TABLE 6 Cata- 1 st, Ex. Oxirane ring containing Amt, Oxyalkylation susceptible Amt, sodium Temp., Time, Product otreactlon No. reactant gms. reactant gms. mlgtly- O. hrs. H

gms.

1a Epoxidized soybeanoiL. 150 Diethylene triamine 57 3 Amber viscous liq. sol. in xylene and 130 0.5 lsopropanol. V 7 2a 125 Amine 333 67. 6 105 3 Orange viscous liq. sol. in xylene and 130 0. 5 isopropanol. 3a 150 Hydroxyethyl ethylene dia- 55.4 105 3 Yel. vise liq, sol.inxy1ene and lsgpromine. 130 0.5 pauol. V V 4a 125 Oyelohexylamine 46 g Brltnoivise. liq. sol. in xyl. and 5a 125 Mornholiue 40.3 s Yi. liq. sol. in 'xyl. and so e.

3H0 6a Furfurylamine 45 3 DE. brln. liq. sol. inxylene and isopro- TABLE 7 e:- ys Ex. Oxirane ring containing Amt... Oxyelkylation susceptible Amt, sodiu'm Temp., Time, Product of reaction No. reactant gins. reactant gms. mleihy- C. hrs.

a e gms'.

Epoxybutyl Stearate 60 Dimeric acid diimidazoline 178 125 3 Black semi-solid sol. in xylene.

184 Armeen 18 157 (2) 5 Brn. visc. liq. sol. in 210. and xylene. 184 Aminoethyl stearamlde" 155 110 '3 Dk. brn. vlsc. liq. sol. in alcohol and 150 0. 5 xylene. 184 Bisiiiuidazoline from diglycolic 68 1. 7 2 Elk. vis. liq. sol. in ale. and xylene.

...... 150 Hydrazine. 13.7 110 3 White creamy emul. with 5% H2O in hydrazine sol. in hot xyl. and isopropanol. Crystalline in cold xyl. and isopropanol.

175 Ethylene i min 110 3 Brn. liq. sol. in xyl. and isoprop. 175 Diethylene triamlne 49 110. 3 D0. 150 Triethylene tetramine 59 5 110 3 D0. 175 Tetraethylene pentamine- 3 Brn.tliq. sol. in xyl. isopropanol and W3. 91. 150 Propylene (iiamine 30. 2 110 3 Do. 150 Propylene triamine 36. 2 110 3 Brn. liq. sol. in Xyl. and isopropanol. 150 Duomeen S 164.0 130 3 Lt. brn. se1mi sol. $0111. in xyl. and isopropano 193 150 Hydrloxyethyl ethylene dia- 428 3 Lt. brn. liq., soLinxyl. anclisopropanol.

m e 2%.... 150 Aminob 36.3 3 Dk. brn. liq. s0l.in xyl. and isopropanol. 21a 150 Aminoethyl propanediol 48.5 125 3 Red vis. liq. sol. in xyl. and isopropano TABLE 8 5:- Y 1 Ex. Oxirane ring containing Amt, Oxyalkyletion susceptible Amt, sodium Temp., Time, Product of reaction No. reactant gms. reactant gms. mletthy- 0. hrs.

a e, gms.

22a. isolgutyltepoxy acetoxy 241 Diethenol amine 42. 8 1.4 8 Lt. brn. liq. sol. in xyl. and alcohol.

s eara e.

- 241 Trishydroxymethylaminoeth- 3 E111. liq. sol. in xylene and alcohol. one 241 1,6 hexane diamine- 115 3 Do. 241 Cyclohexylamine 130 3 Dk. brn. liq. sol. in xyl. and alcohol. 241 Diphenylamine-. 3 Do. 241 m-phenylene diamine- 44. 0 3 Black vise. liq. sol. in xylene and alcohol.

TABLE 9 e y Ex. Oxirane ring containing Amt., Oxyalkylation susceptible Amt., sodium 'lemp., Time, Product of reaction No. reactant gms. reactant gms. mletthy- 0. hrs.

a e, gms.

28s.--- Methyl 1 Epoxysoyate Ethylene diamine (78%) 38 g 5 Brn. vlis. liq. sol. in xyl. and isopropano 2%.--. do 150 Propylene diamine 37 120 1. 5 Dk. bm. vis. liq. sol. in x l. and

150 0. 5 alcohol. 30a do 150 m-Phenylene diamine 54 120 2 Dk. brn. very vis. liq. sol. in xyl. and

165 2 alcohol. 312.... do Hydrazine (95%) 17 110 8 White creamy liq. sol. in hot xyl. and

isopropanol. 32a do 150 Diethanolamlne 53 1 130 3 Brn. vis. liq. sol. in xyl. and alcohol. 33a do 100 Rosin amine D 105 g 5 Lt. yel. liq. sol. in xyl. and alcohol. 343.--- do 150 Mor 45 120 3 Yel. vis. liq. sol. in xyl. and alc. 353---- do 150 Hydroxyethyl ethylene dia- 53 123 g 5 Yel. vis. liq. xyl. and isoprop. soluble.

me. 1 363.--- do 150 Furfuryl amine 49 130 3 Dk.1 vls. liq. xyl. and isoprop.

' so u e.

1 Methyl epoxysoyate-Epoxidized methyl ester of soyabean fatty acid.

TABLE 10 Catalyst,

EX. Oxrrane ring containing Amt, Oxyalkylation susceptible Amt, sodium Temp., Time, Product of reaction No. reactant gins. reactant gins. methy- 0. hrs.

late, gins.

37a Epoxidized triacetyl' 162 Propylene triamine 27.6 110 3 Dk. brn. semi-sol. solu. in xyl. and

ated castor oil. isoprcpanol.

162 Aminobutanol 125 3 "13m. vis. liq. sol. in xylene and alcohol. 162 Aminoethyl propanediol. 125 3 Dk. red vis. liq. sol. in Xyl. and 2.100. 162 m-phenylene diatnine 120 2 Elk. vis. semi-sol. solo. in xyl. and

160 2 alcohol. 135 Arninoethyl stearamide. 78 110 3 Brn. vis. liq. sol. in xyl. and isopropanol. 189 Hydrazine 12 110 3 White creamy semi-solid sol. in hot xyl.

and hot isopropanol. 135 Stearylamine 89 g 5 Brn. vis. liq. sol. in xyl. and alcohol.

135 Duomeen S 100 130 3 Lt. brn. semi-sol. soln. inxyl. and isopropanol. 135 Rosin amine D 79 120 2 Lt. brn. vise. liq. xyl. in xyl. and

150 1 alcohol. 4621.. d 108 Dimeric acid dimidazoline. 158 130 3 Black semi-solid sol. in xylene. 47a. d0 135 Amino-ethyl oleyl imidazoline. 98. 130 3 Dkl. semi-sol. solu. in 'xyl. and

a co 0 48a do 162 N phenyl 2 methyl 1,2 49 130 3 13111. vis. liq. sol. in xyl. and alcohol.

propane diamine.

TABLE 11 Catalyst, Ex. Oxirane ring containing Amt, Oxyalkylation susceptible Amt, sodium Temp., Time, Product of reaction No. reactant gms. reactant gms. mletzny- 0. hrs.

a e gms.

49a. Epoxidized alcohol from 155 Ethylene dianiine 40 120 1. 5 Visc. brn. liq. sol. in xyl. and ale.

soybeanoil (epoxidized 150 0. Unadol 155 Tetramethylene pentamine... 95 12g 2 Vis. liq. sol. in xyl. and alcohol.

5 155 Amine 333 73 12g (1). g Lt. brn. vis. liq. sol. in xyl. and alcohol.

1 155 Hydroxyethyl ethylene dia- 52 120 1. 5 Lt. brn. liq. sol. in xylene and alcohol.

mine. 150 0.25 155 Diethanolamine 53 1 130 3 Brn. vise. liq. sol. in xyl. and alc. 155 Rosin amine D 158 ligg 2 Lt. brn. visc. liq. s01. in xyl. and ale.

TABLE 12 Additive Oxirane containing reactant Amt, Oxyalkylation susceptible reactant Amt, Temp, Time, No. gms. gms. 0. hrs.

1b Epoxidized soybean oil 150 Ethylene diamine 5 2b-.- .do 100 Triethylene tetramine 57. 3 125 3' 3b rln 125 Amine 333 67. 6 3

4b." dn 150 67 5 215 *2 5b--. d0 150 Amine 910 230 2. 5 6b. 150 Diethylene triann'ne 60. 5 125 3 7b Epoxybutyl stearate 150 Polyamine 333 59. 5 2; 8b. do 150 Triethylene tetramine. 59 2 Methyl epoxy stearate i Ethylene diamine 36 32g Epoxybutyl stearate 200 1,6-hexy1ene diamine 72% 40. 5 Triethylene tetramine 79 240 1. 5 Epoxidized triacetylated castor oil 175 Dianlino propane. 27 3 Epoxybntyl stearate 150 Oyclohexylamineinh 40. 5 1 3 Epoxidized soybean oil Ethylene diamine 78%. 43 120 3 Epoxidized triacetylated castor 011.. Oyclchexylarnine. 33 115 3 Epoxybutyl stearate 150 Diarnmo propane- 30. 2 110 3 Epoxidizcd soybean oil 125 Cyclohexylamine 46 g Epoxidizcd triacctylated oastor oil 160 Hydroxyethyl ethylene diamine 35 3 18b do Hydrazine 12. 3 100 3 In Tables 6 to 12, reference has been made to products Dimeric Acid. Emery Dimeric Acid is dimerized linoleic by their trade name or equivalent, all of which are de- 65 acid produced by the Emery Industries, Incorporated.

scribed in detail in the text immediately following: Armeen 18 is a technical grade of stearylamine pr0 Amine 333 is a product of Mathieson Chemical Corduced by Armour Chemical Company.

poration. It is composed of diethylene triamine, triethyl- Duomeen S is an amino propyl =alky1amine,

ene tetramine and tetraethylene pentamine in equal weight RNHC H NH P P 70 derived from soya fatty acid. It is a product of Armour Oxyethylated Rosin Amine D is a technlcal grade of de- Chemical C hydroabietylamine Produced by Hercules Powdfir Ethomeen S/ 15 is also a product of Armour Chemical parry. I I Company. It is the reaction product of five moles of eth- Dimeric Acid Diimidazoline is the reaction product of ylene oxide and one mole of primary alkyl amine derived two moles of triethylene tetramine and one mole of Emory 75 from soya fatty acid.

Unadol 40 is a product of Archer-Daniels-Midland Company. It is an unsaturated C alcohol derived from soyabean oil.

Amine 910 and Amine No. l are crude fractions of polyethylene amines. Amine 910 contains 90% of diethylene triamine 10% of triethylene tetramine while amine No. 1 contains 65% diethylene triarnine, 25% triethylene tetramine and 10% tetraethylene pentamine.

As previously pointed out, a large proportion of the products described above have one or more basic nitrogen atoms. Thus it is possible to add a high molal acid or low molal acid so as to form a salt with the residual basicity. In a number of instances salt formation changes or alters the solubility of the free base in either oil or Water and for a number of purposes makes the salt form more attractive. Where the base has a plurality of basic nitrogen atoms one can neutralize one or more as desired. In general, salt formation with a low molal acid tends to increase water solubility and salt formation with a high molal acid tends to increase oil solubility. Thus, the basic products of reaction can be reacted with low molal acids such as acetic acid, lactic acid, glycolic acid, propionic acid, diglycolic acid and the like to increase Water solubility. If desired, however, one can use naphthenic acid, higher fatty acids, tall oil sulfonic acids, and oil soluble petroleum sulfonic acids such as mahogany acids to form salts.

Table 13 immediately following shows combinations of products which appeared in prior tables combined with various acids illustrating what has been said in this part of the text.

TABLE 13 Solution Com- Amount, Amount, Isopro- Water, conpound grams Acid used grams panol, grams. centra- No. gms tion,

percent 50 Acetic acid 7. 8 30 27. 8 50 60 8. 3 30 28. 3 50 50 15. 30 30. 50 50 3. 8 50 50 6. 7 6O 50 do 6. 7 56. 7 50 50 Propionic acid 8. 4 30 28. 4 50 50 do l3. 2 30 33. 2 50 50 Diglycolic acid. 5. 5 55. 5 50 50 do 3. 2 3O 23. 2 50 2. 6 3O 23. 5 50 9. 4 3O 27 50 9. 7 30 29. 7 50 3. 5 53. 6 50 Furthermore, the products described in Part 3 have at least one reactive hydrogen atom on the hydroxyl group formed by rupture of the oxirane ring and hence are susceptible to reaction with an alkylene oxide. Thus to increase their water solubility they can be treated with one or several moles of, for example, ethylene oxide, glycide, methyl glycide, etc.

Sometimes in an effort to maintain a maximum yield of the compound formed by reaction of the materials described in Parts 1 and 2, there may be formed other products as a result of the change which takes place at least in part after the principal product of reaction has been formed. Without attempting to indicate the variety of complex reactions which can take place and also from the standpoint of indicating why in the hereto attached claims the products are described by method of manufacture, it may be well to illustrate the matter by reference to the cheapest commercially available epoxidized product, to wit, an epoxidized glyceride such as epoxidized soyabean oil, indicated by the formula wherein A represents an oxirane ring.

Such epoxidized glyceride can be reacted with at least 2 moles of a polyamine. Theoretically and actually at least one mole of the polyamine can be caused to react with at least the same number of oxirane rings as appear in the glyceride, i.e., from 2 to 6 moles of the polyamine.

Bearing in mind that the ester can also react to form at least a simple amide, in the same way that soyabean oil, for example, could be reacted with 3 moles of a polyethylene amine to give an amino amide, it is obvious the total number of moles of amine that could be reacted with the glyceride is not only the total number of oxirane rings present in the glyceride but also an additional mole for each acyl radical, i.e., 3 moles more.

It is also obvious that one polyamine may unite 2 or more glycerides by supplying a divalent radical. This may be indicated thus:

Polyamine radical In the above formula A has been changed to A to indicate that the ring has been opened and the polyamine radical is, of course, the divalent radical obtained from amines of the kind herein described. Needless to say, such cross-linking could involve not only 2 moles of glyceride but 3 or 4 moles.

Since the glyceride, like any other fatty acid equivalent, could act as an acylating agent it is obvious that amides could be formed and perhaps the simplest illustration is concerned with the non-saturated acid or, at least an acid which contains no oxirane ring as above depicted and may be indicated thus:

0 R-B( iOH The amide formation from a polyethylene amine would be indicated thus:

in which n is a small whole number such as 1, 2, 3 or 4.

Re-examining the previous formula in which two glycerides were united by means of a polyamine radical, it is obvious that such radical could, of course, unite with an acyl radical by virtue of the terminal polyamino radical, forming an amide as previously depicted. This plexity of the invention as herein stated it is obvious it includes a variety of materials resulting from an initial reaction of an oxirane ring as specified and may result in amidification with the formation of cyclic amidines at a point above the initial reaction temperature and a point below pyrolysis.

The formation of amides of cyclic aoaaaee amidines may be varied by the addition of more monocarboxy acids; in fact, diiferent carboxy acids may be added, or if desired one can add dicarboxy acids. For this reason the present invention is limited merely to the reaction involving the rupture of the oxirane ring, subject to certain qualifications.

Actually, the complexities of epoxidized products go further in that when polyethylenic glycerides are subjected to epoxidation the oxirane ring may be formed and may be opened so as to form a hydroxyl group, or a dihydroxyl group with one ring being left intact. For instance, if one refers to the formulas that have been shown previously it becomes obvious that the radical indicated as R-A--A may become on on RG A Then again if one starts with an unsaturated hydroxylated acid or glyceride, such as castor oil, it is possible to introduce a group like an acetyl group or an oleyl group and have a radical comparable to the following:

Referring to the two previous formulas, to wit,

It is obvious that heating .such glyceride can form an inner amide by reaction with the acyl radical to which the amino group is attached and such inner amide or intra-molecular amide can, of course, on being heated be converted into an inner cyclic amidine or an intramolecular cyclic amidine.

Bearing in mind what has been said previously in regard to the formation of 2 hydroxyl groups in a polyethylenic acyl radical and also in regard to the possible use of acylated triricinolein or the like, or the use, of triricinolein having a single hydroxyl group, it becomes obvious that epoxidation by its very nature may make some slight change or some modest change in the acyl radical with the introduction of the oxirane ring but the product so obtained obviously is still within the claims hereto attached.

Stated another way, although the efiort as far as this example goes is simply to react an epoxidized (glyceride) of the kind described with a polyamine of the kind described so as to open the oxirane ring and not necessarily go any further, yet it follows that as one tries to get a high yield in such reaction invariably and inevitably some other reaction, i.e., some sort of side reaction, may take place. Thus, although the products are described as reaction products involving a reactive hydrogen and the epoxidized glyceride, yet these side reactions may introduce and yield an appreciable amount in some instances of some of the products herein mentioned.

The acyl radical carrying the oxirane ring also may contain a single hydroxyl or two hydroxyls as the result of the opening of an oxirane ring by reaction with water. Furthermore, when the polyamine reacts with the oxirane ring there is a hydroxyl formed on the adjacent carbon atom. Thus, various reactions may take place involving one or more of these hydroxyl groups as, for instance,

dehydration with the formation of an unsaturated bond,

esterification or perhaps even in some instances the reforming of an oxirane 'ring from 2 adjacent hydroxyl groups with ultimate reaction. All of which emphasizes 5 the complexity of the reactions involved, or rather the complexity of possible side reactions when one is attemptiug to produce mainly and substantially the initial resultant of the polyamine herein described and the epoxidized reactant. V w w Referring to the mixed epoxidized derivative, for instance, epoxidized butyl soyate or, for that matter, 'epoxidized soybean fatty acid, it is obvious one can react it with a polyamine, such as triethylene tetramine or tetraethylene pentamine, and form the product of the 'kind previously described. One can add another mole of such polyamine and neutralize the carboxyl radical or eliminate the alkyl radical and heat such product so as to form a cyclic amidine by reaction involving the carboxyl radical or its equivalent.

PART 4 The products prepared as described in Part 3 were evaluated generally according to the procedure outlined in Bactericide Evaluation Method, by Dr. B. H. Moore, presented to Mid-Continent District, American Petroleum Institute Subcommittee on Biological Analysis of In ection Waters, St. Louis Meeting, May 23, 1957.

In this procedure, exposure fluids are prepared having the following compositions:

Low Medium Hardness Hardness Sodium sulfate (anhyd), m 0.2 Magnesium sulfate (6 5 0), gm 0.2

Calcium chloride (2 H20)" 7. 5 Sodium chloride 10. 0 4.0 Tris (hydroxymethyl) aminomethanencn 1.0 1.0 Yeast extract, gm 1.0 1.0 Sodium lactate U.S.P. syrup), ml 4. 0 4. 0 Distilled water, ml 400 400 The pH of each fluid is then adjusted to 11.0, the fluid is allowed to stand overnight, or longer, and is then filtered with suction and diatomaceous earth. One gram of sodium formaldehyde sulfoxylate is added and then sufficient distilled water to one liter total volume. The pH is then adjusted to 7.5 and the fluid is put in an autoclave and heated for 15 to 20 minutes at 10-12 p.s.i. While hot, 0.2 gram of ferrous ammonium sulfate is added. The fluid is then cooled in running tap water.

The bactericides in proper dilution are placed in graded dosage in one-ounce screw oapped bottles so that the desired final concentrations will be present when the bottle is completely filled. The above exposure fluid is inoculated with a standardized culture of sulfate-reducing bacteria and used to fill the bottles to a slightly heaped state. Caps are screwed on and later tightened with pliers. Within an hour or two a viable count is prepared rom the inoculated fluid.

The standardized culture of sulfate-reducing bacteria (Desulfovibrio desulfuricans) employed was an Illinois Strain A and had a count of about 100 to 200x10 per milliliter. The objective was to test bactericides on the basis of a 99.9% kill in 24 hours contact. Therefore we diluted the daily culture of Strain A so that the exposure fluid contained a 1:l0,000 dilution therefrom or to an estimated 10,000 to 20,000 viable cells per milliliter.

Thereafter a 99.9% or 1000/1 kill was detected by survival of 10' to 2 cells per milliliter or less after exposure to the bactericide. This 10 to 20 colonies per culture tube was readily counted or estimated.

The following are results obtained from 99.9% kill of the sulfate-reducing bacteria within 24 hours in soft water and saline solutions containing calcium salts equivalent to 5000 ppm. hardness, as CaCO 'tinuously injected.

antenna Our product in a diluted form is used in the same manner' that other bactericides are used in water flooding.

such a product is given in an article, entitled The Role of Microorganisms, by R. C. Allred, in Producers Monthly, volume 18, No. 4, pages 18-22.

The usual procedure for use of thisproduct is to slug I treat the water system with 50 parts per million of the diluted product and then reduce to the normal treating 2 A'description of the procedure usually followed using" rate of -15 parts per million of a diluted product, confor water floods.

, I 'Asto' further information regarding the use of bactericides in treatment of dead water for secondary recovery,

' 'see the following references: i

' Bacteria andCorrosion Control, Joseph N.Breston,-'

The Oil and Gas Journal, August 25, 1949, pp. 96 et seq.

Eiiect of pH on Water Intake Rates of Oil Sands, J. N. Breston and W. E. Johnson. The Producers Monthly, vol. 9, No. 12, October 1945, pp. 1923.

Field Test of Corrosion Inhibitor for Low-pH Flood Water, J. N. Breston and Kenneth Barton. The Oil and Gas Journal, December 6, 1947, pp. 91-92, 95-96.

Further Field Test Results on Use of Corrosion Inhibitors and Bactericides for Secondary Flood Waters, E. T. Heck, I. K. Barton, and W. E. Howell, The Producers Monthly, May 1949.

Prevention of Microbiological Growths in Water Flood Operations, Jay V. Beck. The Producers Monthly, vol. 11, No. 12, 1947, pp. 21-26.

The herein described bactericides also are eifective as algaecides and slimicides. This means that if the flooding system involves an open pond or pool as is frequently the case this particular property has a distinctive advantage.

Specific attention is directed to the article by Torrey entitled Preparation of Water for Injection Into Water Reservoirs, whichappeared in the Journal of Petroleum Technology, volume 7, No. 4, page 9 (April 1955).

We claim:

1. In a flooding process for the recovery of oil from oil-bearing strata taking place in the presence of anaerobic sulfate-reducing bacteria and soluble ferrous salts, the improvement which comprises flooding the oil-bearing strata with an aqueous liquid containing an amount sufficient to inhibit growth of the anaerobic sulfate-reducing bacteria of the products obtained by reacting at a tem- Sampling and checking :the Water for sulfate reducers will show whether the chemical concentration need be'raised or may be lowered to effectively curtail the bacterial growth to a low general bacterial count and effect a practically complete elimination sulfate reducing bacteria from the water. I I

This is the comrnon'procedure used generally by'operators of water treatment plantspreparing injection water I 28 perature of about 100 to 300 for from about 1 1:04 hours (A) an oxirane ring containing compound. selected from the class consisting of epoxidized higher fatty acids,

epoxidized lower alkanol esters of higher fatty acids, epoxidized ammonia and C toC z alkyl primary monoamine I amides of higher fatty acids, epoxidized higher fatty alcohols and epoxidized higher'fatty acidglycerides, with, (B)

i an oxyalkylation-susceptible nitrogen containing compound selected from the class consisting of hydrazine and monoamino and polyamino compounds composed of car- I 'bon, hydrogen, oxygen and nitrogen atoms, having only functional groups selected from the class consisting'of hydroxyl' groups, primary amino groups andsecondary amino groups and having at least. one such functional amino group; said reaction'betWeen(A) and. (B) involv- I I ing rupture of each oxirane ring and resulting in the formation of at least oneof the following groupings 7 aud ' i 2.; The process ofclaiml wherein; the oxirane ring con-- taining compound. is epoxidized soyabeanoil. p

3. The process of claiml wherein the oXirane. rim 7 "containing compound is epoxybutyl stearate. I I I I containing compound is epoxidized soyabean oiland' the 4. The process of claim 1 wherein the oXirane ring.

containing compound is epoxyrnethyl stcarate- .5. The .processof claim 1 wherein the oxirane ring I containing compound is an epoxidized, alcohol derived from soyabean oil.

, 6. The process of claim 1 wherein the oxirane ring oxyalkylation-susceptible nitrogen containing compound is a mixture of diethylene triamine, triethylene tetramine and tetraethylene pentamine.

7. The process of claim 1 wherein the oxirane ring containing compound is epoxidized soyabean oil and the oxyalkylation-susceptible nitrogen containing compound is ethylene diamine.

8. The process of claim 1 wherein the oxirane ring containing compound is epoxybutyl stearate and the oxyalkylation-susceptible nitrogen containing compound is a mixture of diethylene triamine, triethylene tetramine and tetraethylene pentamine.

9. The process of claim 1 wherein the oxirane ring containing compound is epoxybutyl stearate and the oxyalkylation-susceptible nitrogen containing compound is hydrazine.

10. The process of claim 1 wherein the oxirane ring containing compound is an epoxidized alcohol derived from soyabean oil and the oXyalkylation-susceptible nitrogen containing compound is a mixture of diethylene triamine, triethylene tetramine and tetraethylene pentamine.

References Cited in the file of this patent UNITED STATES PATENTS 2,290,174 Epstein et al July 21, 1942 2,445,892 Swern et a1. July 27, 1948 2,567,237 Scanlan et al Sept. 11, 1951 2,761,870 Payne et a1. Sept. 4, 1956 2,819,278 De Groote et a1 Jan. 7, 1958 2,839,467 Hutchinson et al June 17, 1958 2,890,228 Forester June 9, 1959 

1. IN A FLOODING PROCESS FOR THE RECSOVERY OF OIL FROM OIL-BEARING STRATA TAKING PLACE IN THE PRESENCE OF ANAEROBIC SULFATE-REDUCING BACTERIA AND SOLUBLE FERROUS SALTS. THE IMPROVEMENT WHICH COMPRISES FLOODING THE OIL-BEARING STRATA WITH AN AQUEOUS LIQUID CONTAINING AN AMOUNT SUFFICIENT TO INHIBIT GROWTH OF THE ANAEROBIC SULFATE-REDUCING BACTERIA OF THE PRODUCTS OBTAINED BY REACTING AT A TEMPERATURE OF ABOUT 100* TO 300* FOR FROM ABOUT 1 TO 4 HOURS (A) AN OXIRANE RING CONTAINING COMPOUND SELECTED FROM THE CLASS CONSISTING OF EPOXIDIZED HIGHER FATTY ACIDS, EPOXIDIZED LOWER ALKANOL ESTERS OF HIGHER FATTY ACIDS, EPOXIDIZED AMMONIA AND C1 TO C12 ALKYL PRIMARY MONOAMINE AMIDES OF HIGHER FATTY ACIDS, EPOXIDIZED HIGHER FATTY ALCOHOLS AND EPOXIDIZED HIGHER FATTY ACIDS GLYCERIDES, WITH (B) AN OXYALKYLATION-SUSCEPTIBLE NITROGEN CONTAINING COMPOUND SELECTED FROM THE CLASS CONSISTING OF HYDRAZINE AND MONOAMINO AND POLYAMINO COMPOUNDS COMPOSED OF CARBON, HYDROGEN, OXYGEN AND NITROGEN ATOMS, HAVING ONLY FUNCTIONAL GROUPS SELECTED FROM THE CLASS CONSISTING OF HYDROXYL GROUPS, PRIMARY AMINO GROUPS AND SECONDARY AMINO GROUPS AND HAVING AT LEAST ONE SUCH FUNCTIONAL AMINO GROUP; SAID REACTION BETWEEN (A) AND (B) INVOLVING RUPTURE OF EACH ORIRANE RING AND RESULTING IN THE FORMATION OF AT LEAST ONE OF THE FOLLOWING GROUPING. 